1. Department of Medical Zoology; Faculty of Medicine, Mie University; Tsu Mie 514-8507 Japan
2. Department of Medical Zoology; Nagoya City University Medical School; Aichi Nagoya 467-8601 Japan
3. Department of Medical Zoology; Jichi Medical School; Tochigi 329-0498 Japan
4. Solomon Institute of Medical Training and Research; the Solomon Islands